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      <title>Spring学习文档 - 交互式测验</title>
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          align-items: center;
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          margin: 0;
          padding: 20px;
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            width: 100%;
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            align-items: center;
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          color: white;
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        .quiz-header h1 {
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            font-size: 14px;
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        .quiz-body {
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        .progress-bar {
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            margin-bottom: 20px;
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        #question-container {
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        #question-text {
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          font-weight: 500;
          line-height: 1.6;
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          margin: 0;
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        .option-item {
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          border: 1px solid #dee2e6;
          border-radius: 8px;
          padding: 15px;
          margin-bottom: 12px;
          cursor: pointer;
          transition: background-color 0.2s ease, border-color 0.2s ease;
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        .option-item:hover {
          background-color: #e9ecef;
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        .option-item.selected {
            background-color: #d1e7fd;
            border-color: #4a90e2;
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        .quiz-footer {
          padding: 20px 30px;
          display: flex;
          justify-content: space-between; /* 将按钮分布在两侧 */
          align-items: center;
          min-height: 65px; /* Reserve space */
        }

        .nav-btn {
          background-color: #4a90e2;
          color: white;
          border: none;
          border-radius: 8px;
          padding: 10px 20px;
          font-size: 16px;
          font-weight: 500;
          cursor: pointer;
          transition: background-color 0.2s ease, transform 0.2s ease;
          box-shadow: 0 4px 12px rgba(0,0,0,0.15);
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        #next-btn {
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        .nav-btn:hover {
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        .nav-btn:disabled {
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        .result-box {
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        .result-box.correct {
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        .result-box h3 {
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        .source-text {
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            font-size: 14px;
            margin-top: 15px;
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        .final-score-container {
            padding: 40px;
            text-align: center;
        }
        .final-score-container h2 {
            margin-top: 0;
            margin-bottom: 30px;
        }
        .score-summary {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }
        .score-card {
            background-color: #f8f9fa;
            border-radius: 12px;
            padding: 20px;
            width: 180px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            border: 1px solid #e9ecef;
        }
        .score-card h3 {
            margin: 0 0 10px;
            font-size: 16px;
            font-weight: 500;
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        .score-card p {
            margin: 0;
            font-size: 28px;
            font-weight: 700;
            color: #333;
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            font-size: 16px;
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        .score-details td {
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        .score-details td:last-child {
            text-align: right;
            font-weight: 700;
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            background-color: #fff;
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            border-radius: 8px;
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        .hint-container {
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            border-radius: 8px;
            padding: 15px;
            margin-top: 20px;
            color: #006064;
            font-size: 15px;
            line-height: 1.6;
            display: none; /* 默认隐藏 */
        }
      </style>
    </head>
    <body>
      <div class="main-wrapper">
          <div class="quiz-container">
            <div class="quiz-header">
              <h1>Spring学习文档 - 交互式测验</h1>
              <p>检验你对文档内容的理解程度</p>
            </div>
            <div id="quiz-content">
                <div class="quiz-body">
                    <div class="progress-bar">
                        <div id="progress-indicator"></div>
                    </div>
                    <div id="question-container">
                      <p id="question-text"></p>
                      <ul class="options-list" id="options-list"></ul>
                    </div>
                    <div id="result-container"></div>
                    <div id="hint-container" class="hint-container"></div>
                </div>
                <div class="quiz-footer" id="quiz-footer">
                  <button id="prev-btn" class="nav-btn">上一题</button>
                  <button id="hint-btn" class="nav-btn" style="background-color: #ffc107; color: #333; box-shadow: 0 4px 12px rgba(255,193,7,0.3);">提示</button>
                  <button id="next-btn" class="nav-btn">下一题</button>
                </div>
            </div>
          </div>
      </div>

      <script>
        const quizData = [
  {
    "question": "Spring的核心思想之一是“控制反转”(IoC)。下列哪个选项最准确地描述了IoC的含义？",
    "options": [
      "应用程序代码通过`new`关键字主动创建和管理所有依赖对象。",
      "将对象的创建、配置和生命周期的控制权从应用程序代码转移到外部容器。",
      "一种强制所有组件都必须实现特定接口的设计模式。",
      "将业务逻辑与数据访问逻辑完全分离的一种编程范式。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "控制反转（IoC）的核心在于“反转”二字。在传统编程中，是应用程序代码主动去创建和控制其依赖的对象；而在IoC模式下，这种控制权被反转给了外部容器（如Spring IoC容器）。容器负责对象的实例化、配置和生命周期管理，应用程序代码只需被动地接收容器注入的依赖即可。",
    "source": "文档中「Spring IOC 思想」部分",
    "hint": "思考一下“控制”的主体发生了怎样的“反转”。原文描述为：它将对象的控制权从应用程序代码中转移到一个容器。"
  },
  {
    "question": "在Spring框架中，如果没有明确指定Bean的作用域（Scope），默认的作用域是什么？其主要特点是什么？",
    "options": [
      "Prototype（原型作用域），每次请求该Bean时都会创建一个新的实例。",
      "Singleton（单例作用域），在整个Spring IoC容器中，该Bean定义只对应一个实例。",
      "Request（请求作用域），每次HTTP请求都会创建一个新的实例，仅在Web应用中有效。",
      "Session（会话作用域），每个HTTP会话创建一个实例，仅在Web应用中有效。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "Spring中Bean的默认作用域是Singleton。这意味着当Spring容器初始化时，它会为每个singleton bean定义创建一个唯一的实例。之后任何对该bean的请求，容器都会返回这同一个实例。这对于无状态的服务或组件来说是高效的，但需要注意在多线程环境下的线程安全问题。",
    "source": "文档中「Bean的作用域」-「单例作用域（Singleton）」部分",
    "hint": "文档中明确指出了Spring中默认的Bean作用域。原文提到：`singleton`是Spring中默认的Bean作用域。"
  },
  {
    "question": "Spring AOP底层通过动态代理实现。关于其代理方式的选择，以下描述哪个是正确的？",
    "options": [
      "Spring AOP总是优先使用CGLIB代理，因为它功能更强大。",
      "如果目标对象实现了接口，Spring AOP会优先使用JDK动态代理；如果目标对象没有实现接口，则使用CGLIB代理。",
      "开发者必须在XML配置中显式指定使用JDK动态代理还是CGLIB代理。",
      "无论目标对象是否实现接口，Spring AOP都只使用JDK动态代理。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "Spring AOP会根据目标对象的情况智能选择代理方式。JDK动态代理是Java原生支持的，它要求目标对象必须实现一个或多个接口。如果满足这个条件，Spring会默认使用它。而当目标对象就是一个普通的类，没有实现任何接口时，Spring则会使用CGLIB库，通过生成目标类的子类的方式来创建代理。",
    "source": "文档中「Spring AOP底层实现」部分",
    "hint": "思考一下JDK动态代理和CGLIB代理各自的实现前提。文档提到：如果目标对象实现了接口...如果目标对象没有实现任何接口..."
  },
  {
    "question": "在Spring AOP中，哪个核心概念用于定义一个“匹配连接点的表达式”，从而精确地指定通知（Advice）应该在何处执行？",
    "options": [
      "Aspect（切面）",
      "Join Point（连接点）",
      "Pointcut（切入点）",
      "Proxy（代理）"
    ],
    "correctAnswerIndex": 2,
    "explanation": "Pointcut（切入点）是AOP中的一个关键概念，它是一个表达式，用来筛选符合条件的Join Point（连接点）。简单来说，Join Point是程序中所有可能被增强的点（如方法执行），而Pointcut则定义了一个规则，告诉AOP框架“我只关心这些满足规则的Join Point”，从而实现精确的拦截。",
    "source": "文档中「Spring AOP思想」-「AOP的核心概念」部分",
    "hint": "这个概念被描述为“定义在哪些连接点上应用通知的表达式”。"
  },
  {
    "question": "关于Spring的声明式事务管理，以下哪个说法是正确的？",
    "options": [
      "开发者通过@Transactional注解或XML配置来定义事务边界，将事务控制逻辑与业务代码解耦。",
      "声明式事务管理只能通过XML配置实现，注解方式已被废弃。",
      "开发者必须在每个业务方法中手动编写 `transactionManager.commit()` 和 `transactionManager.rollback()` 代码。",
      "@Transactional注解只能用于标记整个类，不能用于单个方法。"
    ],
    "correctAnswerIndex": 0,
    "explanation": "声明式事务管理的核心优势在于其非侵入性。开发者不需要在业务代码中混入事务管理的逻辑（如手动开启、提交、回滚事务），而是通过元数据（如@Transactional注解或XML配置）来“声明”某个方法或类需要进行事务管理。Spring AOP会根据这些声明自动应用事务逻辑，从而实现业务逻辑和事务控制的解耦。",
    "source": "文档中「Spring 事务管理」-「2、声明式事务管理」部分",
    "hint": "文档中提到“声明式事务管理是Spring推崇的事务管理方式，它允许开发者通过注解或XML配置来定义事务边界”。"
  },
  {
    "question": "在Spring中，`@Service`, `@Repository`, `@Controller`注解都是基于哪个基础注解的特化，用于在不同分层中声明Bean？",
    "options": [
      "@Autowired",
      "@Bean",
      "@Component",
      "@Configuration"
    ],
    "correctAnswerIndex": 2,
    "explanation": "`@Component`是Spring中一个通用的构造型注解，用于标记一个类为Spring容器管理的组件（Bean）。而`@Service`、`@Repository`和`@Controller`是`@Component`的三个特化版本，它们在功能上与`@Component`等效，但提供了更明确的语义，分别用于标记业务逻辑层、数据访问层和表现层的组件，有助于代码的组织和理解。",
    "source": "文档中「Spring常用注解」部分",
    "hint": "文档中对这个基础注解的描述是：“它是其他注解如@Service, @Repository, @Controller的基础注解。”"
  },
  {
    "question": "为了在Spring容器启动时推迟某个Bean的实例化，直到第一次被请求时才创建，应该在XML配置中使用哪个属性？",
    "options": [
      "scope=\"prototype\"",
      "init-method=\"lazy\"",
      "lazy-init=\"true\"",
      "singleton=\"false\""
    ],
    "correctAnswerIndex": 2,
    "explanation": "默认情况下，Spring容器会在启动时创建所有单例（Singleton）Bean，这被称为“饿汉式”初始化。通过将`<bean>`标签的`lazy-init`属性设置为`true`，可以开启懒加载（Lazy Initialization）模式。这样配置后，该Bean将不会在容器启动时被创建，而是等到第一次通过`getBean()`等方式请求它时才会被实例化，这有助于加快应用启动速度。",
    "source": "文档中「饿汉式与懒汉式」-「懒加载（Lazy Initialization）」部分",
    "hint": "文档中提到了一个专门用于指定懒加载的XML属性。原文示例为：`<bean id=\"myBean\" class=\"com.ts.MyBean\" lazy-init=\"true\">`"
  }
];
        console.log("Quiz Data:", JSON.parse(JSON.stringify(quizData))); // 添加这行用于调试，以可展开的JSON格式输出
        
        let currentQuestionIndex = 0;
        let score = 0;
        // 存储每个问题的回答状态
        const userAnswers = new Array(quizData.length).fill(null); 

        const questionTextEl = document.getElementById('question-text');
        const optionsListEl = document.getElementById('options-list');
        const resultContainerEl = document.getElementById('result-container');
        const quizContentEl = document.getElementById('quiz-content');
        const progressIndicatorEl = document.getElementById('progress-indicator');
        const prevBtn = document.getElementById('prev-btn');
        const nextBtn = document.getElementById('next-btn');
        const hintBtn = document.getElementById('hint-btn');
        const hintContainerEl = document.getElementById('hint-container');

        function loadQuestion() {
          resultContainerEl.innerHTML = '';
          optionsListEl.innerHTML = '';
          hintContainerEl.style.display = 'none'; // 隐藏提示
          
          if (currentQuestionIndex >= quizData.length) {
            showFinalScore();
            return;
          }

          updateProgress();

          const currentQuestion = quizData[currentQuestionIndex];
          questionTextEl.textContent = `(${currentQuestionIndex + 1}/${quizData.length}) ${currentQuestion.question}`;
          
          currentQuestion.options.forEach((optionText, index) => {
            const li = document.createElement('li');
            li.className = 'option-item';
            li.textContent = optionText;
            li.dataset.index = index; // Store index in a data attribute
            // 如果这道题已经回答过，恢复状态
            if (userAnswers[currentQuestionIndex] !== null) {
                if (index === userAnswers[currentQuestionIndex]) {
                    li.classList.add('selected');
                }
            }
            optionsListEl.appendChild(li);
          });

          // 如果已经回答过，直接显示结果
          if (userAnswers[currentQuestionIndex] !== null) {
              const isCorrect = userAnswers[currentQuestionIndex] === currentQuestion.correctAnswerIndex;
              showResult(isCorrect, currentQuestion);
          }
          
          updateNavigationButtons();
          updateProgress();
        }

        function selectOption(optionIndex) {
            userAnswers[currentQuestionIndex] = optionIndex;
            const currentQuestion = quizData[currentQuestionIndex];
            const isCorrect = optionIndex === currentQuestion.correctAnswerIndex;

            // 重新计算分数
            score = userAnswers.reduce((acc, answer, index) => {
                return answer === quizData[index].correctAnswerIndex ? acc + 1 : acc;
            }, 0);

            showResult(isCorrect, currentQuestion);
            updateNavigationButtons();
        }
        
        function updateProgress() {
            const answeredQuestions = userAnswers.filter(answer => answer !== null).length;
            const progressPercentage = (answeredQuestions / quizData.length) * 100;
            progressIndicatorEl.style.width = `${progressPercentage}%`;
        }
        
        function updateNavigationButtons() {
            prevBtn.style.display = 'block';
            nextBtn.style.display = 'block';
            hintBtn.style.display = 'block'; // 显示提示按钮

            prevBtn.disabled = currentQuestionIndex === 0;
            nextBtn.disabled = false; // 最后一题时，下一题按钮不禁用，而是用于显示报告
            nextBtn.textContent = (currentQuestionIndex === quizData.length - 1) ? '查看报告' : '下一题';
            
            // 如果当前问题没有提示，则禁用提示按钮并隐藏提示内容
            if (!quizData[currentQuestionIndex].hint) {
                hintBtn.disabled = true;
                hintContainerEl.style.display = 'none';
                hintContainerEl.textContent = ''; // 清除旧的提示内容
            } else {
                hintBtn.disabled = false;
            }
        }

        function showResult(isCorrect, questionData) {
            resultContainerEl.innerHTML = ''; // 清空之前的结果
            const resultBox = document.createElement('div');
            resultBox.className = `result-box ${isCorrect ? 'correct' : 'incorrect'}`;
            
            let html = `<h3>${isCorrect ? '回答正确！' : '回答错误'}</h3>`;
            if (!isCorrect) {
                html += `<p><strong>正确答案是：</strong> ${questionData.options[questionData.correctAnswerIndex]}</p>`;
            }
            html += `<div class="explanation-text">${questionData.explanation}</div>`;
            html += `<div class="source-text">来源: ${questionData.source}</div>`;
            
            resultBox.innerHTML = html;
            resultContainerEl.appendChild(resultBox);

            // 禁用所有选项的点击事件，并高亮正确/错误答案
            Array.from(optionsListEl.children).forEach((child, index) => {
                child.style.pointerEvents = 'none';
                // 高亮正确答案
                if (index === questionData.correctAnswerIndex) {
                    child.classList.add('correct'); // 需要添加CSS样式
                    child.style.backgroundColor = '#d4edda';
                    child.style.borderColor = '#c3e6cb';
                }
                // 如果选错了，高亮错误选项
                if (!isCorrect && index === userAnswers[currentQuestionIndex]) {
                    child.classList.add('incorrect'); // 需要添加CSS样式
                    child.style.backgroundColor = '#f8d7da';
                    child.style.borderColor = '#f5c6cb';
                }
            });
        }

        function goToNextQuestion() {
            if (currentQuestionIndex < quizData.length - 1) {
                currentQuestionIndex++;
                loadQuestion();
            } else {
                showFinalScore();
            }
        }

        function goToPreviousQuestion() {
            if (currentQuestionIndex > 0) {
                currentQuestionIndex--;
                loadQuestion();
            }
        }
        
        function showHint() {
            const currentQuestion = quizData[currentQuestionIndex];
            if (currentQuestion.hint) {
                hintContainerEl.textContent = currentQuestion.hint;
                hintContainerEl.style.display = 'block';
            } else {
                hintContainerEl.style.display = 'none';
            }
        }

        function showFinalScore() {
            document.querySelector('.quiz-body').style.display = 'none';
            document.getElementById('quiz-footer').style.display = 'none';

            const correctCount = score;
            const totalQuestions = quizData.length;
            const answeredCount = userAnswers.filter(a => a !== null).length;
            const wrongCount = answeredCount - correctCount;
            const skippedCount = totalQuestions - answeredCount;
            const accuracy = totalQuestions > 0 ? Math.round((correctCount / totalQuestions) * 100) : 0;
            const errorRate = totalQuestions > 0 ? Math.round((wrongCount / totalQuestions) * 100) : 0;

            const finalScoreHtml =
                '<div class="final-score-container">' +
                '<h2>答题报告</h2>' +
                '<div class="score-summary">' +
                '<div class="score-card">' +
                '<h3>得分</h3>' +
                '<p>' + correctCount + ' / ' + totalQuestions + '</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>正确率</h3>' +
                '<p>' + accuracy + '%</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>错误率</h3>' +
                '<p>' + errorRate + '%</p>' +
                '</div>' +
                '<div class="score-card score-details">' +
                '<table>' +
                '<tr><td>正确</td><td>' + correctCount + '</td></tr>' +
                '<tr><td>错误</td><td>' + wrongCount + '</td></tr>' +
                '<tr><td>未答</td><td>' + skippedCount + '</td></tr>' +
                '</table>' +
                '</div>' +
                '</div>' +
                '<div class="report-actions">' +
                '<button id="review-btn">回顾测验</button>' +
                '<button class="primary" onclick="location.reload()">再试一次</button>' +
                '</div>' +
                '</div>';

            let reportEl = document.querySelector('.final-score-container');
            if (reportEl) {
                reportEl.remove();
            }
            quizContentEl.insertAdjacentHTML('beforeend', finalScoreHtml);
            document.getElementById('review-btn').addEventListener('click', reviewQuiz);
        }

        function reviewQuiz() {
            const reportEl = document.querySelector('.final-score-container');
            if (reportEl) {
                reportEl.remove();
            }

            document.querySelector('.quiz-body').style.display = 'block';
            document.getElementById('quiz-footer').style.display = 'flex';
            
            currentQuestionIndex = 0;
            loadQuestion();
            updateNavigationButtons(); // Ensure nav buttons are correctly displayed
        }

        // Event Delegation for options
        optionsListEl.addEventListener('click', (event) => {
            if (event.target && event.target.matches('li.option-item')) {
                // Check if the question has already been answered
                if (userAnswers[currentQuestionIndex] === null) {
                    const selectedIndex = parseInt(event.target.dataset.index, 10);
                    selectOption(selectedIndex);
                }
            }
        });

        prevBtn.addEventListener('click', goToPreviousQuestion);
        nextBtn.addEventListener('click', goToNextQuestion);
        hintBtn.addEventListener('click', showHint);
        
        // 初始加载
        loadQuestion();
      </script>
    </body>
    </html>
  